Navitron Power
Steer controls are intended for installation in sheltered (bridge or wheelhouse)
locations and are suitable for use as single or multistation units with
all Navitron autopilot types.

Model
NT920NFU
Non Follow Up Control

Fully Type Approved
for inclusion in NT921G/951G and NT990G/991G MK2 Autopilot Systems, the NT920NFU is
a dual function device which enables permanent (NFU) and temporary (DODGE)
heading changes to be ordered at locations remote from the autopilot control
unit.

When set to the
DODGE mode, movement of the sprung to centre jog lever produces a fixed
amount of Port or Stbd rudder (as appropriate) to turn the vessel. When
the jog lever is released to centre, the applied rudder is removed and
the vessel returns to the original heading.

When NFU is selected,
the autopilot course setter is automatically switched to a 'tracking'
mode. Subsequent movement of the jog lever produces a turn to Port or
Stbd (as appropriate) which is 'tracked' by the course setter card as
the vessel is power steered to a new heading. When the required new heading
is attained and the NT920NFU switch is set to DODGE or OFF, the autopilot
course setter card immediately 'locks' and the autopilot resumes control
to maintain the vessel on the new (current) heading.

The
NT990FU (Follow Up) Control is also Type Approved for use with NT951G/NT991G MK2 Autopilot systems and enables permanent (POWER STEER)
heading changes to be ordered at locations remote from the autopilot control
unit.

The direction of movement
of the NT990FU lever (right or left) to initiate Port or Starboard rudder movement is installation selectable and automatically results in reversal of the corresponding red and green sectors on the control panel. This is achieved by bi-colour backlighting which is variable via the ILLUM key.

Two installation programmable modes are available to the operator via the RANGE key. Range 1 can, for example, provide linear ± 40° rudder movement for normal operating use whilst Range 2 can be customised to suit special work requirements (alternative rudder angles, linear or non linear)

When
the NT990FU is engaged (ON) and the vessel is power steered to a new heading by this means, the autopilot
course setter card 'tracks' ships head. On attainment of the new heading
required, the NT990FU key can be set to OFF at which time the course
setter card automatically 'locks' and the autopilot immediately resumes
control to maintain the vessel on the new (current) heading.

Model
NT990FU
Follow Up Control

Model
NT920HRC
Hand Remote Control

Identical in function
to the fixed station NT920FU the Navitron Hand Held Remote Steer Control
type NT920HRC is fitted with a 3 metre length of trailing cable to provide
portable follow up power steer control.